94 lines
2.0 KiB
ObjectPascal
94 lines
2.0 KiB
ObjectPascal
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{******************************************}
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{ }
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{ FastReport VCL }
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{ Chm help viewer }
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{ }
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{ Copyright (c) 1998-2021 }
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{ by Fast Reports Inc. }
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{ }
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{******************************************}
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unit frxChm;
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interface
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{$I frx.inc}
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uses {$IFDEF FPC}LCLType{$ELSE}Windows, Graphics{$ENDIF};
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procedure frxDisplayHHTopic(Handle: THandle; const topic: String);
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implementation
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{$IFDEF FPC}
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procedure frxDisplayHHTopic(Handle: THandle; const topic: String);
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begin
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{$note frxDisplayHHTopic is just dummy proc ...}
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end;
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{$ELSE}
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const
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HH_DISPLAY_TOPIC = $0000;
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HH_DISPLAY_TOC = $0001;
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type
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THtmlHelpA = function(hwndCaller: THandle; pszFile: PAnsiChar;
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uCommand: Cardinal; dwData: Longint): THandle; stdcall;
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{$IFDEF Delphi12}
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THtmlHelpW = function(hwndCaller: THandle; pszFile: PWideChar;
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uCommand: Cardinal; dwData: Longint): THandle; stdcall;
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{$ENDIF}
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var
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{$IFDEF Delphi12}
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HtmlHelpW: THtmlHelpW = nil;
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{$ELSE}
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HtmlHelpA: THtmlHelpA = nil;
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{$ENDIF}
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OCXHandle: THandle = 0;
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function HtmlHelpInstalled: Boolean;
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begin
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{$IFDEF Delphi12}
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Result := (Assigned(HtmlHelpW));
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{$ELSE}
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Result := (Assigned(HtmlHelpA));
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{$ENDIF}
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end;
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procedure frxDisplayHHTopic(Handle: THandle; const topic: String);
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begin
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{$IFDEF Delphi12}
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if (Assigned(HtmlHelpW)) then
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HtmlHelpW(Handle, PChar(topic), HH_DISPLAY_TOC, 0);
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{$ELSE}
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if (Assigned(HtmlHelpA)) then
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HtmlHelpA(Handle, PChar(topic), HH_DISPLAY_TOC, 0);
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{$ENDIF}
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end;
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initialization
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{$IFDEF Delphi12}
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HtmlHelpW := nil;
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{$ELSE}
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HtmlHelpA := nil;
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{$ENDIF}
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OCXHandle := LoadLibrary('HHCtrl.OCX');
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if (OCXHandle <> 0) then
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{$IFDEF Delphi12}
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HtmlHelpW := GetProcAddress(OCXHandle, 'HtmlHelpW');
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{$ELSE}
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HtmlHelpA := GetProcAddress(OCXHandle, 'HtmlHelpA');
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{$ENDIF}
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finalization
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if (OCXHandle <> 0) then
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FreeLibrary(OCXHandle);
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{$ENDIF}
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end.
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